The ABB CI543 is a communication interface module commonly used in ABB’s industrial automation systems, particularly within the AC 800M controller family. Here’s a detailed overview:

Key Features of ABB CI543:

1. Functionality:
   • Acts as a Profibus DP (Decentralized Peripherals) slave interface for the AC 800M controller.
   • Enables communication between the controller and Profibus DP-compatible field devices (e.g., sensors, actuators, drives).
2. Communication Protocol:
   • Supports Profibus DP-V0 (standard) and DP-V1 (extended diagnostics/parameterization).
   • Data transfer rate up to 12 Mbps (auto-negotiated).
3. Hardware Specifications:
   • Mounting: Installed in the AC 800M controller’s module rack.
   • Connector: 9-pin D-sub male for Profibus DP.
   • LED Indicators: Status, communication activity, and error diagnostics.
4. Configuration:
   • Configured via ABB’s Control Builder M (engineering tool for AC 800M).
   • Requires setting the Profibus address (1–126) and baud rate.
5. Typical Applications:
   • Integration with Profibus DP networks in process automation (e.g., chemical, oil & gas, power).
   • Connecting remote I/O, motor starters, and other Profibus DP devices.